Earlier quoted context omitted.
I'm not sure I really agree. It's been done. Mid-engined layouts are just a pain to do maintenance on, generally offer reduced cargo space and interior room. https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/19... https://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Fe...
When has a mass produced middle class car ever looked like that Alfa 4C? It's neither mass produced, nor middle class. It shipped with a $67k msrp. You're talking about a car that sells in the hundreds of units.
They build 3,500 of 'em per year. That's very high compared to say, any given Ferrari or Lamborghini model.